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Multiple extruder configuration
wherein the counter-rotating twin screw extruderbuilds up pressure in the compounds and causes the compounds to exit the apparatus at a desired pressure.
so that screw shafts of the twin screw extruder then counter-rotate.
sending the compounds through a counter-rotating twin screw extruder to buildup a desired exit pressure in the compounds.
Increasingly, the industry is demanding that the finished compounded mixture be formed through a die in the same operation and/or be pressed through a screen pack to screen out larger particles. Both are associated with a relatively large pressure buildup. Although the co-rotating twin-screw extruder is very well suited for mixing tasks, it is very poorly suited for building up high pressures due to its low pumping efficiency. In the case of highly viscous mixtures, very large amounts of heat are then produced by dissipation.